CN103457494A - System and method for parallel control of auxiliary converters of motor train unit in the absence of interconnecting lines - Google Patents
System and method for parallel control of auxiliary converters of motor train unit in the absence of interconnecting lines Download PDFInfo
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- CN103457494A CN103457494A CN2013104182926A CN201310418292A CN103457494A CN 103457494 A CN103457494 A CN 103457494A CN 2013104182926 A CN2013104182926 A CN 2013104182926A CN 201310418292 A CN201310418292 A CN 201310418292A CN 103457494 A CN103457494 A CN 103457494A
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Abstract
The invention relates to a system and method for parallel control of auxiliary converters of a motor train unit in the absence of interconnecting lines. The system comprises an auxiliary converter power circuit and an auxiliary converter control circuit. The auxiliary converter power circuit comprises a plurality of parallel-connection converter power modules, and every auxiliary converter module is composed of an inverter, a transformer and an LC filter. The auxiliary converter control circuit comprises a phase lock synchronous control unit, an instantaneous power calculation unit, a droop control unit, a voltage closed-loop control unit and an intermediate voltage feed-forward control unit. Parallel connection of a plurality of auxiliary converters of the motor train unit is achieved, and redundancy and reliability of the auxiliary converters are improved.
Description
Technical field
The present invention relates to a kind of rail truck auxiliary power supply system, specifically, relating to a kind of motor train unit AuCT has interconnection line parallel operation control system, and the control method of utilizing this system to be controlled.
Background technology
AuCT is one of rail truck basic element of character, plays to power consumption equipments such as the air-conditioning on train, electric water boilers, and stable three-phase, single phase alternating current power supply is provided, improve vehicle riding comfort can effect.AuCT mainly is comprised of inverter, charger and storage battery, relates generally to three-phase inverter here.
At present, it is independently-powered that the general employing of motor train unit respectively saves the AuCT in compartment.Along with the increase day by day of power consumption equipment on car, the capacity of compartment AuCT needs corresponding increase, when the AuCT fault, needs adjacent car to change power supply by contactor, and redundancy, the reliability of AuCT are lower.By the AuCT parallel connection in each joint compartment, can effectively improve reliability and the redundancy of AuCT.Be parallel with two kinds of modes, a kind of is the parallel connection that interconnection line is arranged, and another is the parallel connection of no control interconnection.
Wireless Parallel Control, have another name called droop control, adopt the external characteristic droop method, each AuCT only detects active power of output and the reactive power of this unit, output voltage and the frequency of adjusting this unit by certain algorithm realize current-sharing, compared to there being interconnection line to control, can not introduce outside noise and interference, greatly improved reliability and the redundancy of parallel system.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, reliable motor train unit AuCT no control interconnection parallel operation control system.
Technical scheme of the present invention is: a kind of motor train unit AuCT no control interconnection parallel operation control system, comprise AuCT power circuit and AuCT control circuit, the AuCT power circuit comprises a plurality of inverter power modules that are connected in parallel, and each AuCT module is comprised of the inverter mutually be connected in series, transformer and LC filter; AuCT control circuit Phase-Locked Synchronous control unit, instantaneous power computing unit, droop control unit, voltage close loop control unit and intermediate voltage feedfoward control unit, the input of Phase-Locked Synchronous control unit connects AuCT power circuit ac bus, gather the three-phase bus magnitude of voltage, the voltage output end of Phase-Locked Synchronous control unit connects the input of droop control unit, the phase angle output part of Phase-Locked Synchronous control unit is connected to inverter, and another part feeds back to the Phase-Locked Synchronous control unit; The input of instantaneous power computing unit connects the output of LC filter, gather the electric current of three-phase circuitry phase, the input of instantaneous power computing unit also connects AuCT power circuit ac bus, gather the three-phase bus magnitude of voltage, the output of instantaneous power computing unit connects the input of droop control unit; The output of droop control unit connects the input of voltage close loop control unit, and the output of voltage close loop control unit connects inverter; The input of intermediate voltage feedfoward control unit connects the DC bus end of AuCT module, and the output of intermediate voltage feedfoward control unit connects the input of voltage close loop control unit.
A kind of control method of motor train unit AuCT no control interconnection parallel control system, the method is as follows: Phase-Locked Synchronous control unit and instantaneous power computing unit gather respectively three-phase alternating current busbar voltage, u
a, u
band u
c, the Phase-Locked Synchronous control unit utilizes u
a, u
b, u
cwith reference frequency f
*, calculate phase angle regulated value θ and sagging voltage-regulation value U
0, the phase angle regulated value feeds back to Phase-Locked Synchronous control unit and inverter, for adjusting the angular displacement of inverter phase; The instantaneous power computing unit gathers the output of LC filter, gathers the current i of three-phase circuitry phase
a, i
band i
c, utilize the current i of three-phase circuitry phase
a, i
band i
cand the three-phase alternating current busbar voltage, u
a, u
band u
ccalculate active-power P and the reactive power Q of inverter,, the droop control unit calculates voltage-regulation amount U in conjunction with P, Q
*, intermediate voltage feedfoward control unit gathers the voltage U of inverter DC bus end
cpa, and calculate intermediate voltage feedfoward control output U
c, the voltage close loop control system is according to voltage-regulation amount U
*with intermediate voltage feedfoward control output U
c, finally calculate contravarianter voltage regulated value U, regulate inverter output according to contravarianter voltage regulated value U and phase angle regulated value θ, guarantee each inverter unit steady operation.
The invention has the beneficial effects as follows:
The present invention has realized the parallel connection of a plurality of AuCTs of motor train unit, has increased redundancy, the reliability of AuCT.This control system is used voltage close loop to control, and controls the complexity relative reduce, controls reliability and improves; This control system can realize the accurate Phase-Locked Synchronous of each AuCT power circuit to busbar voltage, and operational reliability in parallel is high.The voltage of the use in this control, PQ all adopt instantaneous value to control, and introduce the intermediate voltage feedfoward control in general PQ droop control, and dynamic property is good.
The accompanying drawing explanation
Accompanying drawing 2 is control system structural representation of the present invention.
Current-sharing electric current experimental waveform figure when accompanying drawing 3 is two AuCT power circuits parallel connections.
The electric current and voltage experimental waveform figure of output separately when accompanying drawing 4 is two AuCT power circuits parallel connections.
Embodiment
Below in conjunction with Figure of description, specific embodiments of the invention are elaborated.
As shown in Figures 1 and 2
Motor train unit AuCT no control interconnection parallel operation control system, comprise AuCT power circuit and AuCT control circuit, the AuCT power circuit comprises a plurality of inverter power modules that are connected in parallel, and each AuCT module is comprised of the inverter mutually be connected in series, transformer and LC filter; AuCT control circuit Phase-Locked Synchronous control unit 7, instantaneous power computing unit 8, droop control unit 9, voltage close loop control unit 10 and intermediate voltage feedfoward control unit 11, the input of Phase-Locked Synchronous control unit 7 connects AuCT power circuit ac bus, gather the three-phase bus magnitude of voltage, the voltage output end of Phase-Locked Synchronous control unit 7 connects the input of droop control unit, the phase angle output part of Phase-Locked Synchronous control unit 7 is connected to inverter, and another part feeds back to Phase-Locked Synchronous control unit 7; The input of instantaneous power computing unit 8 connects the output of LC filter, gather the electric current of three-phase circuitry phase, the input of instantaneous power computing unit 8 also connects AuCT power circuit ac bus, gather the three-phase bus magnitude of voltage, the output of instantaneous power computing unit 8 connects the input of droop control unit 9; The output of droop control unit 9 connects the input of voltage close loop control unit 10, and the output of voltage close loop control unit 10 connects inverter; The input of intermediate voltage feedfoward control unit 11 connects the DC bus end of AuCT module, and the output of intermediate voltage feedfoward control unit 11 connects the input of voltage close loop control unit 10.
During system works, Phase-Locked Synchronous control unit 7 and instantaneous power computing unit 8 gather respectively three-phase alternating current busbar voltage, u
a, u
band u
c, Phase-Locked Synchronous control unit 7 utilizes u
a, u
b, u
cwith reference frequency f
*, calculate phase angle regulated value θ and sagging voltage-regulation value U
0, the phase angle regulated value feeds back to Phase-Locked Synchronous control unit 7 and inverter, for adjusting the angular displacement of inverter phase; Instantaneous power computing unit 8 gathers the output of LC filter, gathers the current i of three-phase circuitry phase
a, i
band i
c, utilize the current i of three-phase circuitry phase
a, i
band i
cand the three-phase alternating current busbar voltage, u
a, u
band u
ccalculate active-power P and the reactive power Q of inverter,, droop control unit 9 calculates voltage-regulation amount U in conjunction with P, Q
*, intermediate voltage feedfoward control unit 11 gathers the voltage U of inverter DC bus end
cpa, and calculate intermediate voltage feedfoward control output U
c, voltage close loop control unit 10 is according to voltage-regulation amount U
*with intermediate voltage feedfoward control output U
c, finally calculate contravarianter voltage regulated value U, regulate inverter output according to contravarianter voltage regulated value U and phase angle regulated value θ, guarantee each inverter unit steady operation.
Current-sharing electric current experimental waveform figure when accompanying drawing 3 is two AuCT power circuits parallel connections.In figure 1 and 2 is respectively two current values on the AuCT power circuit, and as can be seen, after two circuit parallel connections, the current stabilization on circuit, can not suddenly change.
The electric current and voltage experimental waveform figure of output separately when accompanying drawing 4 is two AuCT power circuits parallel connections.In figure 3 and 4 is the magnitude of voltage of exporting on two two AuCT power circuits rear two circuits in parallel, in figure 5 and 6 is the current value of exporting on circuit after two circuit parallel connections, as seen from the figure, the output valve of electric current and voltage is steady, and control system has reliable control effect.
Claims (2)
1. a motor train unit AuCT no control interconnection parallel operation control system, it is characterized in that: comprise AuCT power circuit and AuCT control circuit, the AuCT power circuit comprises a plurality of inverter power modules that are connected in parallel, and each AuCT module is comprised of the inverter mutually be connected in series, transformer and LC filter; AuCT control circuit Phase-Locked Synchronous control unit, instantaneous power computing unit, droop control unit, voltage close loop control unit and intermediate voltage feedfoward control unit, the input of Phase-Locked Synchronous control unit connects AuCT power circuit ac bus, gather the three-phase bus magnitude of voltage, the voltage output end of Phase-Locked Synchronous control unit connects the input of droop control unit, the phase angle output part of Phase-Locked Synchronous control unit is connected to inverter, and another part feeds back to the Phase-Locked Synchronous control unit; The input of instantaneous power computing unit connects the output of LC filter, gather the electric current of three-phase circuitry phase, the input of instantaneous power computing unit also connects AuCT power circuit ac bus, gather the three-phase bus magnitude of voltage, the output of instantaneous power computing unit connects the input of droop control unit; The output of droop control unit connects the input of voltage close loop control unit, and the output of voltage close loop control unit connects inverter; The input of intermediate voltage feedfoward control unit connects the DC bus end of AuCT module, and the output of intermediate voltage feedfoward control unit connects the input of voltage close loop control unit.
2. a motor train unit AuCT no control interconnection parallel operation control method, it is characterized in that: Phase-Locked Synchronous control unit and instantaneous power computing unit gather respectively three-phase alternating current busbar voltage, u
a, u
band u
c, the Phase-Locked Synchronous control unit utilizes u
a, u
b, u
cwith reference frequency f
*, calculate phase angle regulated value θ and sagging voltage-regulation value U
0, the phase angle regulated value feeds back to Phase-Locked Synchronous control unit and inverter, for adjusting the angular displacement of inverter phase; The instantaneous power computing unit gathers the output of LC filter, gathers the current i of three-phase circuitry phase
a, i
band i
c, utilize the current i of three-phase circuitry phase
a, i
band i
cand the three-phase alternating current busbar voltage, u
a, u
band u
ccalculate active-power P and the reactive power Q of inverter,, the droop control unit calculates voltage-regulation amount U in conjunction with P, Q
*, intermediate voltage feedfoward control unit gathers the voltage U of inverter DC bus end
cpa, and calculate intermediate voltage feedfoward control output U
c, the voltage close loop control system is according to voltage-regulation amount U
*with intermediate voltage feedfoward control output U
c, finally calculate contravarianter voltage regulated value U, regulate inverter output according to contravarianter voltage regulated value U and phase angle regulated value θ, guarantee each inverter unit steady operation.
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| CN201310418292.6A CN103457494B (en) | 2013-09-13 | 2013-09-13 | Motor train unit AuCT arcless breaking control system and control method |
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| CN201310418292.6A CN103457494B (en) | 2013-09-13 | 2013-09-13 | Motor train unit AuCT arcless breaking control system and control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716857A (en) * | 2013-12-17 | 2015-06-17 | 北车大连电力牵引研发中心有限公司 | Urban rail vehicle auxiliary system, current-sharing control method and urban rail vehicle |
| CN104796031A (en) * | 2015-05-06 | 2015-07-22 | 西安交通大学 | Novel control system and method for auxiliary inverter of rail transit |
| US10008854B2 (en) | 2015-02-19 | 2018-06-26 | Enphase Energy, Inc. | Method and apparatus for time-domain droop control with integrated phasor current control |
| WO2020020383A1 (en) * | 2018-10-30 | 2020-01-30 | 中车青岛四方车辆研究所有限公司 | Multiple unit parallel auxiliary converter synchronous soft startup networking control strategy |
| CN112104252A (en) * | 2020-09-08 | 2020-12-18 | 中车青岛四方车辆研究所有限公司 | Method and device for calculating power of auxiliary converter of motor train unit |
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| CN101795006A (en) * | 2010-03-11 | 2010-08-04 | 中国科学院电工研究所 | Wireless parallel control method of 400 Hz high-power inverted power supply and control system thereof |
| CN102832839A (en) * | 2012-09-19 | 2012-12-19 | 张笑天 | Method for controlling voltage type parallel inverter |
| CN102983620A (en) * | 2012-10-26 | 2013-03-20 | 中国铁道科学研究院机车车辆研究所 | Auxiliary convertor and parallel connection control method thereof |
| CN203434881U (en) * | 2013-09-13 | 2014-02-12 | 青岛四方车辆研究所有限公司 | Interconnection wire-free parallel power supply control system of auxiliary current transformers of motor train unit |
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Patent Citations (4)
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| CN101795006A (en) * | 2010-03-11 | 2010-08-04 | 中国科学院电工研究所 | Wireless parallel control method of 400 Hz high-power inverted power supply and control system thereof |
| CN102832839A (en) * | 2012-09-19 | 2012-12-19 | 张笑天 | Method for controlling voltage type parallel inverter |
| CN102983620A (en) * | 2012-10-26 | 2013-03-20 | 中国铁道科学研究院机车车辆研究所 | Auxiliary convertor and parallel connection control method thereof |
| CN203434881U (en) * | 2013-09-13 | 2014-02-12 | 青岛四方车辆研究所有限公司 | Interconnection wire-free parallel power supply control system of auxiliary current transformers of motor train unit |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716857A (en) * | 2013-12-17 | 2015-06-17 | 北车大连电力牵引研发中心有限公司 | Urban rail vehicle auxiliary system, current-sharing control method and urban rail vehicle |
| US10008854B2 (en) | 2015-02-19 | 2018-06-26 | Enphase Energy, Inc. | Method and apparatus for time-domain droop control with integrated phasor current control |
| US10951037B2 (en) | 2015-02-19 | 2021-03-16 | Enphase Energy, Inc. | Method and apparatus for time-domain droop control with integrated phasor current control |
| US11355936B2 (en) | 2015-02-19 | 2022-06-07 | Enphase Energy, Inc. | Method and apparatus for time-domain droop control with integrated phasor current control |
| CN104796031A (en) * | 2015-05-06 | 2015-07-22 | 西安交通大学 | Novel control system and method for auxiliary inverter of rail transit |
| CN104796031B (en) * | 2015-05-06 | 2017-04-05 | 西安交通大学 | For a kind of control method of new control system of track traffic subordinate inverter |
| WO2020020383A1 (en) * | 2018-10-30 | 2020-01-30 | 中车青岛四方车辆研究所有限公司 | Multiple unit parallel auxiliary converter synchronous soft startup networking control strategy |
| US11133704B2 (en) | 2018-10-30 | 2021-09-28 | Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. (Cn) | Synchronous soft-start networking control strategy for parallel auxiliary converters of EMU |
| CN112104252A (en) * | 2020-09-08 | 2020-12-18 | 中车青岛四方车辆研究所有限公司 | Method and device for calculating power of auxiliary converter of motor train unit |
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|---|---|
| CN103457494B (en) | 2016-03-23 |
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